The best way to "unamend" your state return is to go through your state return from the beginning and keep your eyes peeled for amend-related screens or questions.
The amend question usually appears right at the beginning or towards the end of the state interview (never in the middle).
Correct any entries that have to do with an amended return, e.g.:
- Answer No when asked if you want to amend;
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Clear any amend-related checkboxes;
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Delete entries in the tax year field.
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Note: In a few state programs, you actually have to answer Yes to the amend question so you can revisit the screens that contain the information you want to delete.
If you still can't get rid of your state amendment form, try deleting your state return and starting over.